> ## Documentation Index
> Fetch the complete documentation index at: https://docs.foglamp.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Cost & pricing

> How Foglamp prices spans.

Foglamp prices every span the moment it arrives, using the token counts the
provider reported. Cost is never recomputed later, so what you see in a trace
is what was calculated when it landed.

## How pricing works

Each [usage dimension](/concepts/data-model#usage) is priced on its own
against a model price table sourced from
[OpenRouter](https://openrouter.ai/api/v1/models) and refreshed every 24 hours.
The priced dimensions are prompt, completion, request, image, web search,
reasoning, cache-read, and cache-write tokens.

The span detail panel shows a **pricing source** so you can see where each cost
came from.

<Note>
  A model Foglamp can't find a price for shows as **`(unknown)`** in cost
  breakdowns, never as `$0`. The Overview's "% priced" number tells you what
  share of LLM spans got a price; a low number usually means you're running a
  model OpenRouter doesn't list yet.
</Note>

## Where cost shows up

* **[Overview](/dashboard/overview)**: total cost, cost over time stacked by
  model, and per-model and per-agent cost tables.
* **[Traces](/dashboard/traces)**: per-span cost and pricing source.
* **[Agents](/dashboard/agents)** and **[Workflows](/dashboard/workflows)**:
  cost totals per agent and per run.
* **[Alerts](/dashboard/alerts)**: alert on `cost` over a time window.